122642140 has 12 divisors (see below), whose sum is σ = 257548536. Its totient is φ = 49056848.

The previous prime is 122642137. The next prime is 122642171. The reversal of 122642140 is 41246221.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3066034 + ... + 3066073.

It is an arithmetic number, because the mean of its divisors is an integer number (21462378).

Almost surely, 2^122642140 is an apocalyptic number.

122642140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

122642140 is an abundant number, since it is smaller than the sum of its proper divisors (134906396).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

122642140 is a wasteful number, since it uses less digits than its factorization.

122642140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6132116 (or 6132114 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 122642140 is about 11074.3911796541. The cubic root of 122642140 is about 496.8362097535.

Adding to 122642140 its reverse (41246221), we get a palindrome (163888361).

The spelling of 122642140 in words is "one hundred twenty-two million, six hundred forty-two thousand, one hundred forty".